i mean, think about, these angels were there and worshipped God as He created the world
they stood fast when satan drew away 1/3 of their brethren
the watched in horror as the serpent beguiled Eve and they cried bitter tears as they stood on guard keeping Adam and Eve out of Eden
they heard the the promise of a redeemer and the looked for Him daily
they saw the first man die
and they saw God's heart break for every sinner that chose not to seek Him and for the need to flood the earth and start over with Noah
for some 4000 years these angels looked for that Blessed Redeemer
and then one day, God calls them in and says, guys, i got a message that needs to go to the earth
this is the big one guys...the Redeemer, the Desire of Nations, the Root of Jesse, He has been borne